Last Updated：2025/11/25
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Astronomers used ephemeris time in calculations to correct for irregularities in mean solar time before it was superseded in the 1970s.
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Astronomers used ephemeris time in calculations to correct for irregularities in mean solar time before it was superseded in the 1970s.
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Related words
ephemeris time
Noun
uncountable
Japanese Meaning
エフェメリス時：不規則に変動する平均太陽時の欠点を克服するために提案された、かつての標準天文用時刻系（天文時刻尺度）で、1970年代に廃止された。
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